SharePoint Document Issues

How to Fix SharePoint Cannot Merge Changes in Office File Error

Guest Writer Sep 30, 2026 869 views

Question details

Users need to resolve a synchronization error that prevents them from merging changes when co-authoring Office files hosted on SharePoint.

How to Fix the SharePoint Office File Change-Merge Error

Product: Microsoft SharePoint / Microsoft Office
Device & OS: not provided
Scenario: Multiple users are attempting to simultaneously edit a shared document, or synchronization conflicts occur between local edits and the server.
Observed behavior: SharePoint displays the specific error message: 'We cannot merge the changes in an Office file.'

Before you start

Before troubleshooting, ensure all collaborators save their current work locally to prevent any accidental data loss during the synchronization reset process.

Solution 1Recommended

Resolve Sync Conflicts and Save a New File Copy

Manually force the synchronization by updating file versions, ensuring no user is in read-only mode, and creating a fresh copy of the document.

This error is primarily caused by conflicting edits that SharePoint's engine cannot merge automatically. By systematically clearing file locks and creating a new copy, you can manually consolidate changes without losing data.

Verify file access status

Ask all collaborators to close the document. Ensure that no user currently has the file open in 'Read-Only' mode, as this restricts synchronization.

Update to the latest version

Have all users refresh their SharePoint folder or click 'Sync' in their OneDrive client to ensure they are pulling the latest version of the file from the server.

Review Versioning Settings

Navigate to the SharePoint Document Library, click the Settings (gear) icon in the top right, select 'Library settings', and then click 'Versioning settings'. Ensure that version history is enabled to track changes properly.

Create a new copy

If the merge block persists, have the user with the most recent edits click 'File' > 'Save As' and save the document under a new name. Upload this new copy to SharePoint to serve as the new master file.

Resolve Sync Conflicts and Save a New File Copy

Communication is Key: When creating a new master copy, communicate with your team to ensure everyone switches to editing the newly uploaded file to avoid repeating the conflict.

Solution 2

Contact Microsoft 365 Support

If the merge error persists across all newly created files in the environment, escalate the issue to your Microsoft 365 administrator.

Free Microsoft Office alternative

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1. Download and install: Get the free WPS Office suite from the official website and install it on your device.
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3. Collaborate easily: Use the built-in 'Share' button to upload the document to WPS Cloud and invite your team to co-edit in real time.

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Frequently Asked Questions

Why does SharePoint say it cannot merge changes in my Office file?

This error occurs when multiple users edit the same document simultaneously and make conflicting changes to the same section, or when network issues prevent local edits from syncing smoothly with the SharePoint server.

How do I check versioning settings in SharePoint?

Go to your SharePoint Document Library, click the gear icon in the top right corner, select 'Library settings', click 'More library settings' if prompted, and then select 'Versioning settings'. Here you can view and adjust how document versions are tracked.

Will I lose my work if SharePoint fails to merge the changes?

Usually, your changes are preserved locally in the Office application cache. If the sync fails, the Office app will typically prompt you to 'Save a Copy' to your local hard drive so your recent edits are not lost.

Document & File Issues